const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}

const formatDate = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()

  return `${[year, month, day].map(formatNumber).join('-')}`
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : `0${n}`
}

const uuid = () => {
  var d = new Date().getTime();
  var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
      var r = (d + Math.random() * 16) % 16 | 0;    // d是随机种子
      d = Math.floor(d / 16);
      return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
  });
  return uuid;
}

module.exports = {
  formatTime, formatDate, uuid
}
